Spectator #2578

[Matakari]

Good evening, last set of clues for which I seek answers, after which, I hope, the theme should be quite clear! Thanks in advance!
37 ( A ) Frothy half of beer May brewed (5) : R??M?
3 ( D ) Worrying cockney’s getting fiery (6) : ??T?N?
31 ( D ) Bummer footwear (6) : L???ER
32 ( D ) Walk like warden outside? (6)

[Spicerack]

37. reamy

[Spicerack]

3. butane?

[Toorak]

31 loafer

[Spicerack]

31. loafer

[Spicerack]

32. wander

[Neveracrossword]

3 Eating (from Heating, said by cockney)

31 Loafer
32 Pasear

[Neveracrossword]

32 is Pasear, walk. As, like, with Pear, a warden is a kind of pear, round it.

[Matakari]

Many thanks, all! On to Chambers for the theme now!

[Neveracrossword]

Thanks, Matakari. With Chambers - and the hints already given on AB - I think you'll fare well with the theme itself.